console.log('index.js文件被加载了~');
// import { mul } from './test';

// console.log(mul(2, 3));

document.getElementById('btn').onclick = function () {
  import(/* webpackChunkName: 'test', webpackPrefetch: true */ './test').then(({ mul }) => {
    console.log(mul(4, 5));
  });
};
